I also noticed that. Opened issue: https://github.com/ncase/blog/issues/4

That would be 5g. At this point everyone should notice that something is off. :-D 5000 mg of vitamin D3 = 200,000,000 IU (200 million IU)

If you don't have an underlying condition it is way better to get the Vitamin D from the sun in 10-30min increments per day after which you are saturated for the day. Overdose is not possible via the sun (excluding sun burns of course).

> A single, optimal sun exposure session might produce the equivalent of 10,000 to 25,000 IU from a supplement, but it will not keep increasing with more time in the sun. That's your max per session.

Isn't the oral intake pretty much negligible anyway? I remember getting a vitamin d supplement in a syringe (to be put on bread, from a physician) containing a very large dosis.

I'm not stating the dosage is wrong. Looks like it is anyway.

That’s a large enough error that it calls the rest of the writing into question, in my opinion.

Also, be careful taking 5000 IU/day of Vitamin D. I did this for a few months and it was enough to send my blood levels over the top of the range, even in winter.

Too much Vitamin D is not good for you. The supplement fans have gone too far in recommending too high of dosages. My doctor said she’s seeing a lot of people with excessively high Vitamin D levels now that it has become popular.

So 5000 IU is the recommended amount?

Even 5000IU a day is huge and will likely result in calcium buildup.

yes, once i saw that i stopped reading. if the author can't get that right i am not going to trust anything else they say.

Is "IU" another case of xkcd 927?

I used an LLM to summarize and it told me 5000 IU.

Only recently again I read in the newspaper, that most products are overdosed. There is a typical number that the vitamin D products usually show, and in the article it said, that only up to 800 IU is safe, and everything above is an overdose. There are many products out there with 2000 UI or maybe even more. Beware.

EDIT: Wow, the HN-local doctors at it again. Imagine getting downvoted for sharing information from newspaper article (and honestly labeling that info as such), that probably was written by someone consulting medical professionals. But hey HN will know better!

It's unbelievable crazy what the author suggests, even say "10,000 IU if you're feeling daring / have darker skin / live in less sunny climates.".

Just a simple look at the side effects of high dosages:

Safety and side effects

Taken in typical doses, vitamin D is thought to be mainly safe.

But taking too much vitamin D in the form of supplements can be harmful and even deadly. Taking more than 4,000 IU a day of vitamin D might cause:

    Upset stomach and vomiting.
    Weight loss and not wanting to eat.
    Muscle weakness.
    Not being able to think clearly or quickly.
    Heart rhythm issues.
    Kidney stones and kidney damage.